<template>
  <div class="article-container">
    <!-- 导航栏 -->
    <van-nav-bar
      class="page-nav-bar"
      @click-left="$router.back()"
      left-arrow
      title="头条"
    >
    </van-nav-bar>
    <!-- /导航栏 -->

    <div class="main-wrap">
      <!-- 加载中 -->
      <div v-if="loading" class="loading-wrap">
        <van-loading color="#3296fa" vertical>加载中</van-loading>
      </div>
      <!-- /加载中 -->

      <!-- 加载完成-文章详情 -->
      <div v-else-if="article.title" class="article-detail">
        <!-- 文章标题 -->
        <h1 class="article-title">{{ article.title }}</h1>
        <!-- /文章标题 -->

        <!-- 用户信息 -->
        <van-cell class="user-info" center :border="false">
          <van-image
            class="avatar"
            slot="icon"
            round
            fit="cover"
            :src="article.aut_photo"
          />
          <div slot="title" class="user-name">{{ article.aut_name }}</div>
          <div slot="label" class="publish-date">{{ article.pubdate }}</div>

          <!-- 关注和不关注 按钮 封账成组件 -->
          <ArticleBtn
            class="isfollowed-btn"
            :aut_id="article.aut_id"
            v-model="article.is_followed"
          />
          <!-- <van-button
            class="follow-btn"
            round
            size="small"
          >已关注</van-button> -->
        </van-cell>
        <!-- /用户信息 -->

        <!-- 文章内容 -->
        <div
          class="article-content markdown-body"
          v-html="article.content"
          ref="contentImg"
        ></div>
        <van-divider>正文结束</van-divider>

        <CommentList
          @emitTotal="emitTotal"
          :articleId="article.art_id"
        ></CommentList>

        <!-- 底部区域 -->
        <div class="article-bottom">
          <van-button
            class="comment-btn"
            type="default"
            round
            size="small"
            @click="isPopupShow = true"
            >写评论</van-button
          >
          <!-- 写评论弹出层 -->
          <van-popup v-model="isPopupShow" position="bottom"
            ><ComentPost :artId="this.article.art_id" @isPingShow="isPingShow"
          /></van-popup>
          <!-- /写评论弹出层 -->

          <van-icon name="comment-o" color="#777" :badge="articleTotal" />

          <ArticleShou
            v-model="article.is_collected"
            :aut_id="article.art_id"
          />
          <ArticleLike v-model="article.attitude" :aut_id="article.art_id" />
          <van-icon name="share" color="#777777"></van-icon>
        </div>
        <!-- /底部区域 -->
      </div>
      <!-- /加载完成-文章详情 -->

      <!-- 加载失败：404 -->
      <div v-else-if="errState === 404" class="error-wrap">
        <van-icon name="failure" />
        <p class="text">该资源不存在或已删除！</p>
      </div>
      <!-- /加载失败：404 -->

      <!-- 加载失败：其它未知错误（例如网络原因或服务端异常） -->
      <div v-else class="error-wrap">
        <van-icon name="failure" />
        <p class="text">内容加载失败！</p>
        <van-button class="retry-btn" @click="getXiang()">点击重试</van-button>
      </div>
      <!-- /加载失败：其它未知错误（例如网络原因或服务端异常） -->
    </div>
  </div>
</template>

<script>
import { getArticle } from "@/api/article.js";
import { ImagePreview } from "vant";
import ArticleBtn from "@/components/article-btn.vue";
import ArticleShou from "@/components/article-shou.vue";
import ArticleLike from "@/components/article-like.vue";
import CommentList from "./coment-list.vue";
import ComentPost from "./coment-post.vue";
export default {
  props: {
    articleId: {
      type: [Number, String],
      required: true,
    },
  },
  data() {
    return {
      article: {},
      loading: false,
      errState: 0,
      followLoading: false,
      articleTotal: 0,
      //写评论弹出层
      isPopupShow: false,
    };
  },
  created() {
    this.getXiang();
  },
  components: {
    ArticleBtn,
    ArticleShou,
    ArticleLike,
    CommentList,
    ComentPost,
  },
  methods: {
    async getXiang() {
      this.loading = true;
      try {
        const { data: res } = await getArticle(this.articleId);

        //模拟错误
        if (Math.random() > 0.5) {
          //   JSON.parse("akhdj");
        }
        this.article = res.data;

        this.loading = false;
      } catch (err) {
        if (err.response && err.response.status === 404) {
          this.errState = 404;
        } else {
          this.errState = 400;
        }
        this.loading = false;
      }
    },
    //点击图片 可以来回切换
    showImg() {
      setTimeout(() => {
        let img = this.$refs.contentImg.querySelectorAll("img");
        let images = [];
        img.forEach((item, index) => {
          images.push(item.dataset.src);
          item.onclick = () => {
            ImagePreview({
              images,
              startPosition: index,
            });
          };
        });
      }, 0);
    },
    // 更改评论的总数量
    emitTotal(val) {
      this.articleTotal = val;
    },
    // 关闭评论弹出层
    isPingShow() {
      this.isPopupShow = false;
    },
  },
};
</script>

<style scoped lang="less">
@import "./markdown.css";

.article-container {
  /deep/ img {
    width: 100%;
  }
  white-space: pre-wrap;
  .main-wrap {
    position: fixed;
    left: 0;
    right: 0;
    top: 92px;
    bottom: 88px;
    overflow-y: scroll;
    background-color: #fff;
  }
  .article-detail {
    .article-title {
      font-size: 40px;
      padding: 50px 32px;
      margin: 0;
      color: #3a3a3a;
    }

    .user-info {
      padding: 0 32px;
      .avatar {
        width: 70px;
        height: 70px;
        margin-right: 17px;
      }
      .van-cell__label {
        margin-top: 0;
      }
      .user-name {
        font-size: 24px;
        color: #3a3a3a;
      }
      .publish-date {
        font-size: 23px;
        color: #b7b7b7;
      }
      .follow-btn {
        width: 170px;
        height: 58px;
      }
    }

    .article-content {
      padding: 55px 32px;
      /deep/ p {
        text-align: justify;
      }
    }
  }

  .loading-wrap {
    padding: 200px 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #fff;
  }

  .error-wrap {
    padding: 200px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #fff;
    .van-icon {
      font-size: 122px;
      color: #b4b4b4;
    }
    .text {
      font-size: 30px;
      color: #666666;
      margin: 33px 0 46px;
    }
    .retry-btn {
      width: 280px;
      height: 70px;
      line-height: 70px;
      border: 1px solid #c3c3c3;
      font-size: 30px;
      color: #666666;
    }
  }

  .article-bottom {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-sizing: border-box;
    height: 88px;
    border-top: 1px solid #d8d8d8;
    background-color: #fff;
    .comment-btn {
      width: 282px;
      height: 46px;
      border: 2px solid #eeeeee;
      font-size: 30px;
      line-height: 46px;
      color: #a7a7a7;
    }
    .van-icon {
      font-size: 40px;
      .van-info {
        font-size: 16px;
        background-color: #e22829;
      }
    }
  }
}
</style>
